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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4. #define NeedForSpeed ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0)
  5. #define int long long
  6. #define endl '\n'
  7. #define all(x) (x).begin(), (x).end()
  8. #define Create_File freopen("code.in", "r", stdin);
  9. const long long INF = 1ll << 32;
  10. const long double PI = acos(-1);
  11. const int N = 200005, mod = 1000000007;
  12.  
  13. int32_t main()
  14. {
  15.   NeedForSpeed;
  16.   // Create_File;
  17.  
  18.   int test_cases = 1;
  19.   // cin >> test_cases;
  20.   int cases = 1;
  21.   while (test_cases--)
  22.   {
  23.     int n;
  24.     cin >> n;
  25.     if (n % 2 == 1)
  26.       cout << "WA" << endl;
  27.     else
  28.     {
  29.  
  30.       stack<string> st;
  31.       bool acc = true;
  32.       int cnt = 1;
  33.  
  34.       for (int i = 0; i < n; i++)
  35.       {
  36.  
  37.         string start;
  38.         cin >> start;
  39.         if (start == "Header" && i == 0)
  40.           cnt--;
  41.         if (cnt < 0)
  42.           acc = 0;
  43.         if (start == "EndHeader" && i != n - 1)
  44.           acc = 0;
  45.  
  46.         if (start[0] == 'E' and start[1] == 'n' and start[2] == 'd' and i == 0)
  47.         {
  48.           acc = 0;
  49.         }
  50.         else if (start[0] != 'E' and start[1] != 'n' and start[2] != 'd')
  51.         {
  52.           st.emplace(start);
  53.         }
  54.         else
  55.         {
  56.           string s = st.top();
  57.           if (s[0] == start[3])
  58.             st.pop();
  59.           else
  60.             acc = 0;
  61.         }
  62.       }
  63.       if (acc and st.empty() == true)
  64.         cout << "ACC" << endl;
  65.       else
  66.         cout << "WA" << endl;
  67.     }
  68.   }
  69.   return 0;
  70. }
Success #stdin #stdout 0.01s 5432KB
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Standard input is empty
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WA
https://ideone.com/5NE381
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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